Air-pump.



@Evi L'Hcmct P. W. KPLLo-GG, AIR PUMP.

APPLICATION FILED KOV.1.190B.

PATPNTPD APR. 21,1908.

2 SHEETS-SHEET 1.

` armi PATBNTBD 8.88:. 21', 1908.

G. W. KELLOGG.

AIR P U MP.

AYPLIOATION FILED Nov.1.19o8.

2 SHEETS-SHEET 2.

nucnhyz K, QZL@ Y A Gummi,

\ witnesses UNITE STATES PATENT oFFroE.

GEORGE W. KELLOGG, OF ROCHESTER, NEW YORK, ASSIGNOR TO WRAY PUMP & REGISTER l COMPANY, OF ROCHESTER, NEW YORK, A CORPORATION OF NEW YORK.

AIR-PUMP.

y No. 885,485.

Specification of Letters Patent.

Patented April 21, 1908.

T o all whom' it Imay conce/'11,:

Be it known that 1GEonGi-3 W. KELLOGG, a resident of Rochester, in the county 0i Monroe and State of New York, have invented certainnew and useful Improvements in' Air-Pumps; and 'l do hereby declare the fpllowing to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use thc same. p

The invention-relates to pumps, and has for its object to increase the cfliciency, and diminish the labor of operation ot' a pump of sim le and compact construction.

T ie invention consists in the constr-'uction hereinafter described and pointed out.

1n the accompanying drawing which illustrates the invcntiomwliigure 1 is a longitudinal section of the pump, the cylinders being shown in an intermedia-te situation; Fig. 2 is a ,view indica-ting a modification; Fig. 3 is 'a longitudinal section illustrating a modification.

Numeral 1 denotes a base or support of any approved character, and 2 a check valve in an exit or delivery pipe 3, communicating through the valve port with a cylinder 4 sup )orted'on the base.

1 umeral 5 indicates a larger cylinder mounted to. reciprocate in a telescoping m 'iner on the exterior of cylinder 4.

A tubular iston rod is indicated at 6, and is iixed to cy inder 5, and 7 denotes a piston having a flexible cup-valve-packing 8.

A spring-supported check valve is denoted The piston rod is movable through a stu tl'- ing box 10 which is lixed upon the end oi the inner cylinder. A cup or valve packing is denoted by 11, and a handle for actuating the pump by 12.

13 indicates one -or more inlets near the lower end of cylinder 5, and 14 one or more inlets at or near the upper end of tube whereby said cylinder 5 and tube Gcommunicate. .15` denotes yan exit or delivery port at or near the lower end of cylinder 4, and 16 are ports by which air passes from tube 6 into the lower cylinder around its piston.

1n operation air is admitted through a port or ports 13, which will be situated above the stufling box and its flexible packing 11 when the outer cylinder is at or near its highest situation. At such time outside air enters the upper cylinder. Whemsaid port 13 is below the level of the,stutting box air freely enters or'escapes from the annular space 18 between the cylinders. li th upper cylinder, having been raised and liked withhair, entering through port or ports 132 as stated, be forced down its contained air is driven through ports 14 into and through tube 6 and out through ports 16 into the space between the piston and the stulling box. The descent oi' the outer cylinder, and of the iston 'Iixed thereto, forces the air which is lielow said piston )ast the check valve 2 and through the delivery tube to a wheel tire or other receptacle. When the outer cylinder and the piston lixed to it are again raised the air between the piston and 'stuiling box escapes through the passage or port around the piston into the lower cylinder to be forced out as before past the check valve by the next down stroke of thc outer cylinder and the piston.

Obviously instead of relying u )on the pas sage of air down around the ilexi le packing, it might be -forced through a port c osed b a check valve, as indicated in Fig. 2, in Whic i the piston is denoted by 7 and the check valve by 7X. These devices are well known equivalents `for admitting air below or in `front of a retreating piston.

The construction and operation of the device arc such that air compression is ei'lected by a movement in one direction, which may be downward so that the operator can make his weight contribute to the power' required. This method is more convenient andagreeable to the operator, and is secured by the simple and compact construction and arrangement oi' parts described.

As shown in Fig. 3, the exterior' cylinder 5 receives air through one or more ports 13 whenever said cylinder and its connected piston 7 are actuated to compress' air in cylinder 4. In the reverse movement the air from cylinder 5 passes through ports 21 and past the flexible packing 20 provided to prevent return of air to cylinder 5, In this case a solid iston rod 6X can be used, as indicated. 'n this form air compression is etl'ected substantially as above stated.

The air inlet or inlets 13- are situated substantially as illustrated whereby in theup stroke., that is, the stroke that carries inlet 13 above the vpacking `11 and admits air above the packing, said. stroke is cushioned derinto tlic lower cvlin der of returning said air to the .C ei'ior oi the pump? lt is obvious that the pump may be so held that the stroke for cf. f be down or up or in any ntl -iion desired but prelierably it will be down as sei4 forth.

Having described the invention what l claim is,

l. ln pump the combination oi the iixed and movable te coping cylinde s, 'the movable piston having: tubular rod and Jfixed thereby to the movable cylinder, said piston being operated in. the fixed cylinder, and suitable ports whereby both cylindeie are filled when they are extended and whereby air is compressed and delivered when one cylinder is telescoped within the other.i y

2, ln a pump, the coirlbination of a movable cylinder, a piston rod lined to said-cylinder, a tilted or stationary cylinder, a' stuifing box between the cylinders and lined to said stationary cylinder, a piston 'fixed to said rod and operative in the stationary cylinder, and suitable ports whereby air is admitted to both vcylinders when the piston is moved in one direction and compressed when it is oppositely moved.

, n a pump, the combination olf the outer cylinder, the inner cylinder, the stul'ling box fixed to the inner cylinder and bearing on the interior of the outer cylinder, the air inlet in the outer cylinder adapted to be moved past said box to admit air to the ou ter cylin-4 passages all substantially as described wherev by air admitted during one movement of the piston may be compressed during a return movement, all exterior air being admitted tliroueh said inlet in the outer cylinder.

5. in a pump, the combination of two telescoping cylinders, a stationary valve packing and cap iiXed to the end ot the inner cylinder a. Y cap being perforated, said latter cylinder having an air inlet in its periphery near its end whereby air is successively admitted to the outer cylindery below and above said packing and without passing between the packingand outerv cylinder.

6. ln pump, the combination of two telescoping cylinders, a relatively stationary valve packing between said cylinders, and a piston actuated by the exterior cylinder, said exterior cylinder having its sole means of air admission in its periphery adjacent the said packing.

7. n a pum n, thecoinbination of yan outer movable cylint er having 'a closed end, a rod iixed to said end and provided at its opposite 'end with a iston an inner station'ar c linder coperating with said outer cylinder and piston, a valve packing between the c linders, and suitable ports to admit air to oth` cylinders including a port adjacent said nd bearing on the outer cylinder, said.

packing admitting exterior air directly ,to the outer cylinder on either side of lsaid acking ,according to the situation of the cy inders,

the outer cylinder' containing an-air chamber closed except for the packing vwhen said packing is below the port.

8. In a pump, the combination of the telescoping cylinders, the piston i'iXed to the outer cylinder, a packing between the cylinders, and an air portadmitting air to either side. of saidy packing according to ythe movement oi the outer cylinder, whereby the upstroke of' the outer cylinder is cushioned and whereby in the down stroke direct communication with the outer air o'l the outer cylin'der above said packing is cut'oil'A In testimony whereof, l have signed' this specification in the presence of two subscribing witnesses. GEORGE W. KELLOGG.

1Witnesses: 'i

E. L. ELLwANeER, MORTIMER E. WILE. 

